Needle valve pump



Dec. 8, 1931. Q BROWN 1,835,009

NEEDLE VALVE PUMP Filed March 27, 1930 n Ill I VIII/[1111A 2 q ATTORNEYS III Patented Dec. 8, 19.31

UNITED STATES PATENT ori-lcsA GREGORY BROWN, OF FAIRFIELD, CONNECTICUT, ASSIGNOR TO BBIDGEPORT BRASS CONHANY, 0F BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNFETICUT NEEDLE 'VALVE PUMP Application med March 27, 1930. Serial No. 439,274.

This invention relates to improvements in needle valve pumps and the principal object is the provision of a pump or supplying air pressure to tanks such as gasoline stove tanks and the like which includes as a unitary part of the pump a needle valve construction which may be closed to seal the tank after the requisite pressure has been obtained therein and which may be readily opened to permit the operation of the pump to increase the pressure.

A further object of this invention is the provision of a pump having a needle valve construction mounted upon the end of the plunger and movably and resiliently held with reference to the same, in combination with a discharge connection having a seat for the valve whereby the valve may be opened and closed as desired.

A further object of this invention is the new method and means of retaining a ball check valve in operative position within the discharge connection of the pump.

To the accomplishment of the foregoing and such other objects ask may hereinafter appear, this invention consists in the construction, combination and arrangement of parts hereinafter described and then sought to be defined in the appended claims, reference being had to the accompanying drawings forming a part hereof and which shows, merely for the purpose of illustrative disclosure, a preferred embodiment of my invention, it being expressly understood, however, that various changes may be made in practice within the scope of the claims without digressing from my inventive idea.

In the drawings Figure 1 is a perspective view of a pump constructed to embody my invention.

Figure 2 is a detailed enlarged cross sectional View of the operating end of the pump in operative position.

Figure 3 is a similar view, additional parts being shown in section and the pump being shown in inoperative position.

Figure 4 is a front end elevation of the pump.

Figure 5 is a vertical transverse cross section 3taken substantially on line 5-5 of Figure Figure 6 is a View illustrating the method of assembling the ball valve.

Referring now to the drawings, the numeral 1 designates the pump cylinder generally, and the numeral 2, the pump or piston rod. The pump cylinder 1, is provided with a reduced portion 3 at its forward end, in which is mounted the nipple member 4. This nipple member 4 has the internal screw threadedY portion or compartment 5 which communicates with the externally threaded attaching boss or nipple 6 by means of the restricted openingV 7 formed in the partition 65 8 separating these two parts. The member 6 is drilled to provide a ball receiving compartment 9 and a wider outlet opening 10 forming a shoulder 11 therebetween. At this shoulder an internal recess 12 is cut into 70 the boss or nipple, into which a cupped washer 13, is pressed by means of the punch 14 (see Figure 6') which lattens out the cupped washer so that it iits within the recess 12 and securely holds the ball valve 15 therein, it 75 being understood that the ball has previously been placed in position. This washer 13 may be of any suitable spider or open work construction to permit the passage of 'air thereby or therethrough. The partition 8 is pro- 80 vided on one side with the bevelled seat 16 for the ball valve and on the other side with the bevel seat 17 for a needle valve to be presently described.

The pump plunger 18 is secured to the end 85 of the rod 2, which extends a .substantial distance through the plunger. A needle valve construction 19 is secured to the extended end of the rod by means of the following construction: The needle valve cornprises the valve proper 20, the threaded stem portion 21 adapted to fit the threads 5 on the inside of the nipple member 4 and the extended stem portion 22. This extended stem portion is eXteriorly threaded as at 23 to re- 95 ceive the cup shaped sleeve 24 having the flanged end 25. This sleeve 24 has its end bored as at 26 to permit the passage of the end of the rod 2 therethrough and into the bore 27 formed within the end of thestem 100 94 to limit the rearward movement of the plunger with reference to the sleeve. A spring 30 is interposed between the plunger 18 and the flange 25 of the sleeve 2li-to normally hold the sleeve and the connected needle valve in an extended position with reference to the plunger and to permit relative movement between the plunger and the needle valve.

The pump is screwed into a suitable connection by means of the threaded nipple end 6 with ball valve 15 resting against its seat 16, to prevent back pressure. The pump is operated to build up air pressure through the connection until the desired pressure is reached.` The plunger is then moved forward. and turned, causing the threaded valve stem 21 to engage the threaded part 5 and be moved forward in nipple member 4 until the valve proper 2() seats tightly against its seat 17 in the partition 8. This positively prevents leakage of the pressure while the parts are maintained in this position.

It is to be noted that the pump may be operated without any contact between the needle valve and its seat and without contact between the threaded portions 5 and 21. This avoids damage to these parts. Furthermore, if the threaded stem 21 of the valve does contact with threads 5, the slidable connection of the valve'with the plunger and the interposed spring, will permit the valve to move back on the plunger and prevent damage or distortion to the parts. lDue to the key construction, the needle valve is connected so as to be rotated by the plunger and piston to permit it to be closed upon its seat, the connection being sufficiently resilient to prevent damage to the parts, and being sutliciently positive to insure movement of the needle valve to and from its open and closed position.

What I claim is:

1. A device of the character described including, in combination, a pump cylinder, a plunger reciprocably mounted therein, a discharge connection for said cylinder, a valve seat and an interiorly threaded chamber adjacent thereto, a valve movably and resiliently connected to said plunger and having a screw threaded portion adapted to fit the threads of said chamber, whereby when the plunger is rotatedthe valve will be forced against its seat by said thread engagement.

2. A device of the character described, including, in combination, a cylinder, a discharge connection on one end thereof, a valve seat and a threaded chamber adjacent thereto, a plunger mounted in said cylinder and a needle valve operatively connected to said plunger so as to be rotated therewith, but having a sliding and resilient connection with the plunger so as to have independent movement with relation thereto, said valve having threaded means adapted to engage the threads of said chamber whereby when rotated the valve will be forced to or from its seat.

3. In combination, in a device of the character described, a cylinder, a plunger, a needle valve connected to the end of the plunger so as to be rotatable therewith but to have an independent movement with respect thereto.

4. In combination, in a device of the chara eter described, a cylinder, a plunger, a. needle valve, means for connecting said valve to the end of said plunger so that the valve may be rotated therewith but also may have an independent movement with respect thereto, said means including an elongated valve stem ha'ving a bore adapted to receive the plunger with means for limit-ing the movement of the plunger therein, and resilient means to limit the movement of the valve with respect to the plunger.

5. In combination, in a device of the character described, a pump cylinder provided with' a valve opening in one end thereof, a rod, a plunger mounted thereon and having the rod extending therethrough, a needle valve adapted to close said valve opening and having a movable and resilientv connection with said rod so as to be turned therewith but having independent longitudinal movement with reference thereto.

6. In combination, in a device of the character described, a pump cylinder provided with a valve opening in one end thereof, a rod, a plunger mounted thereon and having the rod extending therethrough, a needle valve adapted to close said valve opening, said valve having a movable and resilient connection with said rod so as to be turned therewith but having independent longitudinal movement with reference thereto, said )unection including an elongated stem on said valve, having a bore to receive the end of said rod, means for limiting the movement of said rod within said bore, and to prevent its retraction therefrom.

7. In combination, in a device of the character described, a pump cylinder provided with a valve opening in one end thereof, a rod, a plunger mounted thereon, and having the rodl extending therethrough, a. needle valve adapted to close said valve opening, said valve having a movable and resilient connection with said rod so as to be turned therewith but having independent longitudinal movement with reference thereto, said connection including an elongated stem on said valve and having a bore to receive the end of said rod, means for limiting the movement of said rod within said bore and to prevent its retraction therefrom, and resilient means lltl interposed between said needle valve and said plunger.

8. In combination, in a device of the character described, a pump cylinder provided with a valve opening in one end thereof, a rod, a plunger mounted thereon and having the rod extending therethrough, a needle valve adapted to close said valve opening, said valve having a movable and resilient connection with said rod so as to be turned there- With but having independent longitudinal movement with reference thereto, said connection including an elongated stem on said needle valve having a bore to receive the end of said rod, a sleeve secured to said stem and ada ted to retain said valve upon the end of sai rod.

9. In combination, in a device of the character described, a pump cylinder provided with a valve opening in one end thereof, a rod, a plunger mounted thereon and having the rod extending therethrough, a needle valve adapted to close said valve opening, said valve having a movable and resilient conneet-ion with said rod so as to be turned therewith but having independent longitudinal movement With reference thereto, said connection including an elongated stem on said needle valve having a bore to receive the end of said rod, a sleeve secured to said stem and adapted to retain said valve upon the end of said rod, said stem being provided with a longitudinal slot to permit relative longitudinal movement between these parts and to provide means for rotating the valve when the rod is rotated.

10. In combination, in a device of the character described, a cylinder, a discharge connection at one end of said cylinder, a rod, a plunger mounted thereon Within said cylinder, a needle valve, means for mounting said needle valve on said rod adjacent said discharge connection so that the needle valve may have a limited longitudinal movement with reference to said rod, but is connected therewith so as to be turned thereby, said discharge connection and said needle valve havingcomplementary threaded parts which When engaged and the needle valve turned Will force the needle valve to and from its seat.

11. In combination, in a device ofthe character described, a cylinder, a discharge connection at one end of said cylinder in the form of a nipple member, a rod, a plunger mounted on one end of the rod Within the cylinder, a needle valve connected to said rod so as to be rotated thereby but having a limited resiliently controlled movement with respect thereto,said needle valve having an exteriorly threadedportion, said discharge connection including an attaching nipple a ball valve therein and a valve seat on said nipple, said nipple also having an inner valve seat and an internally threaded portion adof March, 1930.

GREGORY BROWN. 

